Installing the CIK home phone is very simple. On each phone box, there are Internet, WAN or DSL, LAN and telephone port. You only need to connect the modem to the internet or Wan port of the phone box first, then connect the LAN port of the phone box to computer or your router. The phone is connected to the Phone1 port of Phone box. Restart all devices, wait 10 minutes, then you can make calls normally. Please be aware that the first time you use it, you may have to wait 10 minutes because the phone box is going to get the configuration file from our server.